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Bifurcation of closed paths from a closed path in \(R^ 2\). (English) Zbl 0514.34029

Nonlinear phenomena in mathematical sciences, Proc. int. Conf., Arlington/Tex. 1980, 703-711 (1982).

MSC:

34C05 Topological structure of integral curves, singular points, limit cycles of ordinary differential equations
34C25 Periodic solutions to ordinary differential equations